From what I could see it is like a conical volcano shape, With a detail that can vary, making a Dome or simply open like a chimney.

According to Ai, royal yurts should be larger and made of the best materials and with expensive details, that is, fabrics and props.

@wowgetoffyourcellphone can a structure have both terrain hugging elements (like a wheat field) and a model? If so, the dock could just be a smallish yurt with the skeleton of a boat next to it, a fire, and a rope ladder used to slide boats into the water. The rope ladder could just behave the same way as farms so that it doesn't hover over the shore.

I think all but the royal yurt and maybe the scythian version of the ovoo would need models. I think the royal yurt could just be a more decorated version of the current yurt (house), maybe using more luxurious prop points as well. The ovoo would be more complicated. Overall, the structure would be similar to the xiongnu one but made of stacked wood. Also, I don't know if the flags were used by the scythians like the xiongnu have on their ovoo. And then in general, we have a problem where the yurt fabric for scythians and xiongnu looks very similar across the board like @Lion.Kanzen said. Maybe a move to use more hides or skins for one civ, maybe xiongnu, could help.

We need new textures. Something that differentiates the Scythians cultures and the Xiongnu culture. -The dock does not even have a conceptual design. The same goes for the stable.  

@Genava55 Great, thanks! My plan is to create 5 or 6 steles (2 potato heads, 2 deer stones, 1-2 babas). @wowgetoffyourcellphone When all meshes are ready and I have a final UV layout I'm gonna bake it again. I need to tweak the normal strength again. On the first one the stone texture normals are too strong and the highpoly normal is too weak. I added ambient occlusion to my material setup, no idea why it didn't bake that, but I'll find a way to add shadow. When everything is baked I could add some moss/ weathering effects/ bird @#$% with texturepaint. When all is done I plan to use them for the kurgan wonder that I'm already working on. @real_tabasco_sauce Are there models that would only need existing textures? I could try to make a mesh then